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  5. Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति

11th Class Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Work, Energy And Power Conceptual Problems

  • question_answer
    A porter moving vertically up the stairs with a suitcase on his head does work. Why?

    Answer:

                    The porter lifts the suitcase vertically to the upstairs. Force has to be applied on the suitcase against the force of gravitation. Hence the porter does work.


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